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Adoption of New Accounting Pronouncements - Additional Information (Details) - CAD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Initial Application Of Standards Or Interpretations [Line Items] |  |
Gain on other investments | $ 221,000 | $ 4,858,000
Changes in carrying amounts of financial instruments as a result of adoption of IFRS 9 | 0 |
Impairment of financial assets | 0 |
Equity investments designated at fair value through other comprehensive income [member] |  |
Disclosure Of Initial Application Of Standards Or Interpretations [Line Items] |  |
Gain on other investments | 294,000 |
Fair value of investments | $ 961,000 |

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of financial assets in the statement of financial position that were previously designated as measured at fair value through profit or loss but are no longer so designated, and that were reclassified due to requirements of IFRS 9 when the entity initially applies IFRS 9. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 42I -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_42I_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The gains (losses) on disposals of investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 98 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_98_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of impairment loss on financial assets. [Refer: Financial assets; Impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 20 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_20_e&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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